v3.5.0.1

Note 7 - Accrued Liabilities (Details Textual) - Zheng Ge Electrical Company Ltd [Member] $ in Millions	3 Months Ended
	Apr. 30, 2016 USD ($)
Uninvoiced Materials and Services [Member]
Accounts Payable and Other Accrued Liabilities	$ 0.3
Percent of Total Uninvoiced Materials and Services	98.00%
Total Uninvoiced Materials and Services [Member]
Accounts Payable and Other Accrued Liabilities	$ 0.3

X

- Definition

Represents percent of total uninvoiced materials and services

+ References

No definition available.

+ Details

Name:	cmro_PercentOfTotalUninvoicedMaterialsAndServices
Namespace Prefix:	cmro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of liabilities incurred and payable to vendors for goods and services received, and accrued liabilities classified as other.

+ References

No definition available.

+ Details

Name:	us-gaap_AccountsPayableAndOtherAccruedLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_MajorCustomersAxis=cmro_ZhengGeElectricalCompanyLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_NatureOfExpenseAxis=cmro_UninvoicedMaterialsAndServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_NatureOfExpenseAxis=cmro_TotalUninvoicedMaterialsAndServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: